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def is_reversible(n): if n % 10 == 0: # Avoid leading zeroes in the reverse return False sum_n_reverse = n + int(str(n)[::-1]) # Sum of n and its reverse for digit in str(sum_n_reverse): if int(digit) % 2 == 0: # Check for even digits in the sum return False return True def count_reversible_numbers(limit): count = 0 for i in range(1, limit): if is_reversible(i): count += 1 return count def main(): test_cases = int(input()) for _ in range(test_cases): limit = int(input()) reversible_count = count_reversible_numbers(limit) print(reversible_count) if __name__ == "__main__": main()

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## Project Euler #145: How many reversible numbers are there below one-billion?

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